The invention discloses a planting device which comprises a windmill and multiple opening planting containers. The windmill comprises a base and multiple blades hinged on the base through a hinging shaft, a water flow passage is arranged on each blade, the planting containers are hinged on the inner side walls of the water flow passages, and a water getting port communicated with the corresponding water flow passage is arranged at the tail end of each blade. When the blades rotate, the water getting ports at the tail ends of the blades get water from a water storage tank, and the water gotten by the water getting port gradually flows through the water flow passages to enter the planting containers as the blades continue rotating; the planting containers are horizontally hinged to the side walls of the water flow passages, so that as long as the center of gravity of each planting container is lower than its hinging height, an opening at the top of the corresponding planting container can be constantly maintained upward under action of gravity. As the blades rotate, after going through the water getting ports and then flowing through the water flow passages, the water can gradually enter the water storage tank through the water getting ports, so that recycling of irrigation water is realized in the whole process, and water resources are saved.